WO2005090511A1 - 研磨用組成物および研磨方法 - Google Patents
研磨用組成物および研磨方法 Download PDFInfo
- Publication number
- WO2005090511A1 WO2005090511A1 PCT/JP2005/003627 JP2005003627W WO2005090511A1 WO 2005090511 A1 WO2005090511 A1 WO 2005090511A1 JP 2005003627 W JP2005003627 W JP 2005003627W WO 2005090511 A1 WO2005090511 A1 WO 2005090511A1
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- WO
- WIPO (PCT)
- Prior art keywords
- polishing
- polishing composition
- inorganic salt
- composition
- salt
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02002—Preparing wafers
- H01L21/02005—Preparing bulk and homogeneous wafers
- H01L21/02008—Multistep processes
- H01L21/0201—Specific process step
- H01L21/02024—Mirror polishing
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1454—Abrasive powders, suspensions and pastes for polishing
- C09K3/1463—Aqueous liquid suspensions
Definitions
- the present invention relates to a polishing composition used for polishing a semiconductor substrate, a hard disk substrate, and the like, and a polishing method using the same. More specifically, the present invention relates to a polishing composition containing silica fine particles, water, a basic substance, or an inorganic salt and having an improved polishing rate, and a polishing method using the composition.
- polishing liquid in which silica fine particles are suspended in an alkaline solution around pHIO and a nonwoven fabric (polishing pad) with a special structure are used for such surface tension.
- CMP polishing
- FIG. 1 shows an outline of this polishing apparatus.
- the polishing is performed while continuously supplying slurry 13 (a slurry supply section is not shown) to the interface between the polishing pad 11 and the wafer 12.
- slurry 13 a slurry supply section is not shown
- the polishing pad 11 is affixed to the polishing platen 14 and the wafer 12 is affixed to the wafer carrier 15.
- the polishing platen 14 and the wafer carrier 15 rotate, and a relative speed difference therebetween is given, and a polishing pressure is applied between the polishing platen 14 and the wafer 12.
- Silica fine particles are usually stored in an alkaline solution because they are easily aggregated in an aqueous solution. Soshi
- silica fine particles are dispersed and stored in an alkaline aqueous solution and used as an abrasive.
- a polishing solution such as 3900! ⁇ (Fujimi Co., Ltd.) is a brand name 11 ⁇ > 1300 (Rodel-Tatta Co., Ltd.) It is a silica fine particle alkaline polishing liquid.
- An example of a polishing liquid in which silica fine particles are suspended in an alkaline solution is also described in Patent Document 1.
- silica fine particles having different production methods and shapes are used as abrasives.
- a colloidal material that also produces alkoxysilane power is used.
- Silica power It is extremely superior to fumed silica and colloidal silica made from water glass.
- colloidal silica has the disadvantage of a low polishing rate.
- polishing rate is low, the applicable range is only used as a part of polishing a metal film of a touch-polished semiconductor substrate for eliminating scratches in a final polishing process of a silicon wafer. Under such circumstances, it has been strongly desired to improve the polishing rate of silica fine particles.
- a polishing liquid using silica fine particles as an abrasive is generally used in an alkaline state.
- the reason why it is used alkaline is that the polishing rate is improved.
- Examination of the polishing rate of silicon wafers by adding ammonia to the polishing liquid shows that the higher the alkalinity, the higher the polishing rate.
- This is one means of improving the polishing rate of silica fine particles, and this means of making the polishing liquid alkaline is also used in commercially available polishing liquids.
- the silica fine particles are easily dissolved in an alkaline aqueous solution having a pH of 9 or more, the actual polishing liquid cannot be made unnecessarily high in pH.
- the present inventors have earnestly studied a method for improving the polishing rate without adding a large amount of alkali, and have arrived at the present invention.
- Patent Document 1 Japanese Patent Application No. 2002—3717811
- the present invention provides, as an abrasive,
- a polishing composition containing fine silica particles, water, a basic substance, and an inorganic salt containing fine silica particles, water, a basic substance, and an inorganic salt.
- a polishing composition which is an alkali metal salt or an ammonium salt as an inorganic salt. And so on,
- the polishing composition of the present invention can be easily obtained by mixing silica fine particles, water, a basic substance, and an inorganic salt, but the polishing composition containing the silica fine particles, water, and the basic substance is prepared in advance. It can be easily prepared by preparing and adding an inorganic salt thereto. Therefore, the polishing composition of the present invention can be produced even when an inorganic salt is added to a commercially available polishing composition containing fine silica particles, water and a basic substance. In this method for producing a polishing composition, the silica fine particles aggregate in the composition, the particle diameter changes, the instability of changing the polishing rate is eliminated, and stable storage for a long period of time is possible. Further, the polishing composition of the present invention may include a wetting agent or the like contained in the ordinary polishing composition other than the fine particles containing silica fine particles, water, a basic substance, and an inorganic salt.
- a comparison between the conventionally known polishing composition containing silica fine particles, water and a basic substance and the polishing composition of the present invention obtained by adding an inorganic salt to this polishing composition shows that the polishing composition of the present invention The object shows a much higher polishing rate.
- a polishing composition which does not generate aggregates of silica fine particles after mixing an inorganic salt with the polishing composition containing silica fine particles, water, and a basic substance exhibits a higher polishing rate. This is because if an aggregate of silica fine particles is generated, the polishing rate is reduced.
- the generation of aggregates of silica fine particles as referred to here means that the silica fine particles associate or aggregate or have a large particle size.
- the silica fine particles that can be used in the polishing composition of the present invention may be manufactured by any manufacturing method and may have any shape.
- the colloidal silica force is more preferable than the fumed silica. Because fumed silica is synthesized in a high-temperature flame, the particles often fuse with each other and the surface is not smooth. Therefore, as long as the surface is smooth, it may be melted at high temperature. For example, spherical silica obtained by remelting fumed silica into large particles is also a preferable silica fine particle.
- the particle size of the silica fine particles used in the polishing composition of the present invention is not particularly limited, but is preferably from 5 to 500 nm, more preferably from 20 to 200 nm.
- the particle diameter of the silicon force is too fine, it will be buried in the unevenness in the pad during the polishing process, and the polishing ability cannot be exerted.
- the particle size is too large, the silica fine particles in the polishing composition will precipitate and the particles will not be able to reach the polishing interface between the wafer and the polishing pad immediately.
- the polishing composition of the present invention contains a basic substance! / Because it is alkaline.
- the alkalinity is preferably in the range of 7.5 to 12.0 at pH.
- a more preferred pH range is 8.0 at 10.5. This is because, when the pH is in the range of 8.0 to 10.5, the polishing rate is significantly improved by the use of inorganic salted kafun.
- the stability of the slurry is low, and in the case where the pH is higher than 12.0, the silica fine particles dissolve and the particle size is reduced.
- the reason that the polishing composition of the present invention contains a basic substance is that the polishing composition containing fine silica particles, water, and the basic substance can be stored and immediately added with an inorganic salt. This is a force that allows the polishing composition of the present invention to be easily produced.
- the basic substance that can be used in the present invention is not particularly limited, but a compound that is difficult to associate with silica fine particles is preferable.
- it is an alkali metal hydroxide such as NaOH or KOH or NHOH (aqueous ammonia).
- TMAH tetramethylammonium hydroxide
- Amines such as can also be used.
- it is KOH or NH OH (aqueous ammonia)
- the content of the silica fine particles in the polishing composition of the present invention is preferably 0.1 to 5.0% based on the weight of the entire polishing composition, and the force S is preferably 0.2 to 1.0. % Is more preferable. If the amount is too large, the silica fine particles tend to agglomerate, causing a reduction in the polishing rate.
- the inorganic salts of the present invention include KC1, KSO, KNO, NaCl, NaSO, NaNO, NHCl, NHCl.
- Alkali metal salts such as NO and (NH) SO, and ammonium salts.
- Seeds can be selected.
- the amount of the inorganic salt in the polishing composition is large and moderate. This is the force that the more the polishing rate increases. However, if the amount is too large, the silica fine particles tend to aggregate, which may cause a reduction in the polishing rate.
- a preferred range is 1.0 mol or less per liter of the polishing composition.
- the composition contains an inorganic salt.
- a more preferred range is a composition containing 0.5 mol or less of an inorganic salt per liter of the polishing composition. The preferred range also depends on the type of the inorganic salt, the pH of the polishing composition, and the like.
- the polishing method of the present invention is performed using the above-mentioned polishing composition.
- a polishing method called V so-called mechanical chemical polishing (CMP), using a polishing liquid (slurry) and a non-woven fabric (polishing pad) having a special structure
- CMP mechanical chemical polishing
- Fig. 1 shows the outline of this polishing apparatus.
- the polishing is performed while continuously supplying the slurry 13 (the slurry supply section is not shown) to the interface between the polishing pad 11 and the wafer 12.
- the polishing pad 11 is attached to the polishing platen 14, and the wafer 12 is attached to the wafer carrier 15.
- the polishing platen 14 and the wafer carrier 15 rotate to give a relative speed difference, and a polishing pressure is applied between the polishing platen 14 and the wafer 12.
- FIG. 1 is an explanatory diagram of a polishing apparatus.
- the polishing process was performed using a polishing composition of Malto's diamond wrap ML-150P and a polishing pad of Fujibo's EXP-2, and a 2-inch silicon wafer with the polishing composition under the following polishing conditions.
- the polishing rate of the standard polishing composition was set to 100%, and a relative value thereof was used.
- a silica fine particle, a standard polishing composition containing a basic substance is prepared by adding ammonia, Loose (HEC), pure water, diethylene glycol, etc. were prepared.
- the polishing composition of the present invention containing an inorganic salt was prepared by adding an inorganic salt to a standard polishing composition.
- Example 1 Example 2, Example 3 and Example 4
- Example 1 The polishing compositions of Example 1, Example 2, Example 3 and Example 4 were prepared by adding the salt shown in Table 1 corresponding to the amount of 0.36 mol / 1 to the standard polishing composition.
- the polishing rate of this polishing composition was measured by the method described above, the results shown in Table 1 were obtained. From Table 1, it can be seen that the polishing composition of the present invention in which an inorganic salt was added did not contain an inorganic salt! / ⁇ had a higher polishing rate than the standard polishing composition.
- Example 6 Ammonium chloride 1 50 8.3 Example 7, Comparative Example 1, and Comparative Example 2
- Example 7 0.07 mol / 1 of the salt shown in Table 3 was added to the standard polishing composition to prepare the polishing compositions of Example 7, Comparative Examples 1 and 2.
- the polishing rate of this polishing composition was measured by the method described above, and the results are as shown in Table 3. From Example 7 in Table 3, it can be seen that the polishing composition of the present invention has a higher polishing rate than the standard polishing composition containing no inorganic salt, even if the amount of added calorie is small.
- silica particles started to aggregate and precipitate immediately after the addition of the alkali salt to which the alkaline earth metal salt was added. For this reason, the polishing speed was too low to measure.
- Example 8 Example 9 and Comparative Example 3
- the polishing compositions of Examples 8, 9 and Comparative Example 3 were prepared by adding 0.29 mol / 1 of aqueous ammonia and 0.36 mol / 1 of the salt shown in Table 4 to the standard polishing composition. .
- Table 4 shows the polishing rate of this polishing composition measured by the above-described method. From Table 4, it can be seen that even the polishing composition of the present invention to which an inorganic salt was added contained no inorganic salt! / ⁇ It can be seen that the polishing rate is higher than that of the standard polishing composition.
- Comparative Example 3 was obtained by adding ammonia to the standard polishing composition to increase the pH, and shows that increasing the pH increases the polishing speed.
- Example 8 and Example 9 show that the polishing rate is increased by one layer compared to a case where only the ammonia, which is the polishing composition of the present invention, to which an inorganic salt that can be replaced with ammonia alone is added, is added. However, the rate of increase is lower than in Examples 1 and 4 where the pH is low.
- polishing composition of the present invention having a pH of 8.3.
- the polishing rate of this polishing composition was 154% when measured by the above method. Even when two kinds of inorganic salts were added, the polishing rate was increased by tl compared to the polishing composition without the addition of the inorganic salts.
- polishing composition of the present invention having a pH of 9.8.
- Precipitation of silica fine particles occurred in the polishing composition, but the polishing composition was used for polishing while stirring, and the polishing rate was measured by the above method.
- the polishing rate was 171%, which was higher than that of the polishing composition containing no inorganic salt.
- the polishing rates were lower than those of Examples 1, 5, 7, and 8, where no precipitation occurred.
- a polishing composition was prepared using spherical silica fine particles having an average particle size of 34 Onm, which were produced by heating fumed silica to increase the particle size.
- the production method is a method in which silica, fine particles of ammonia, hydrodoxyl cellulose (HEC), and pure water are added.
- This polishing composition contains 0.5 wt% of silica, 2250 wt. Ppm of ammonia, and 175 wt. Ppm of Fujichem HEC CF-X.
- the polishing rate of this polishing composition was 61% when measured by the above method.
- the polishing rate of this polishing composition is slower than that of the standard polishing composition, but this is because the particle diameter is large.
- polishing composition of Comparative Example 4 0.36 mol / 1 of sodium salt was added to the polishing composition of Comparative Example 4 to prepare a polishing composition of the present invention.
- polishing rate of this polishing composition was measured by the above method, the polishing rate was 86%.
- the polishing rate of this polishing composition was increased to 141% as compared with the polishing composition of Comparative Example 4 in which no inorganic salt was added.
- the polishing composition of the present invention contains conventionally known fine silica particles, water, and a basic substance.
- the polishing composition has a significantly improved polishing rate as compared with the polishing composition of the present invention, is easy to manufacture, and has a small burden on the disposal of concentrated and alkaline liquids, and is an excellent polishing composition.
- This polishing composition can be widely used for polishing of semiconductor substrates, hard disk substrates and the like. Polishing with the polishing composition improves the polishing rate.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/593,147 US20080096475A1 (en) | 2004-03-19 | 2005-03-03 | Polishing Composition and Polishing Method |
JP2006511147A JPWO2005090511A1 (ja) | 2004-03-19 | 2005-03-03 | 研磨用組成物および研磨方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004080183 | 2004-03-19 | ||
JP2004-080183 | 2004-03-19 |
Publications (1)
Publication Number | Publication Date |
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WO2005090511A1 true WO2005090511A1 (ja) | 2005-09-29 |
Family
ID=34993678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/003627 WO2005090511A1 (ja) | 2004-03-19 | 2005-03-03 | 研磨用組成物および研磨方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080096475A1 (ja) |
JP (1) | JPWO2005090511A1 (ja) |
KR (1) | KR20060135028A (ja) |
WO (1) | WO2005090511A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20180022485A (ko) * | 2016-08-24 | 2018-03-06 | 삼성에스디아이 주식회사 | 산화막용 cmp 슬러리의 제조 방법 |
WO2023032714A1 (ja) * | 2021-09-01 | 2023-03-09 | 株式会社フジミインコーポレーテッド | 研磨用組成物 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5297695B2 (ja) * | 2008-05-30 | 2013-09-25 | Sumco Techxiv株式会社 | スラリー供給装置及び同装置を用いる半導体ウェーハの研磨方法 |
WO2013094399A1 (ja) * | 2011-12-22 | 2013-06-27 | コニカミノルタ株式会社 | 研磨材再生方法及び再生研磨材 |
KR20140102696A (ko) * | 2011-12-27 | 2014-08-22 | 코니카 미놀타 가부시키가이샤 | 연마재 분리 방법 및 재생 연마재 |
WO2017069560A1 (ko) * | 2015-10-23 | 2017-04-27 | 오씨아이 주식회사 | 실리콘 텍스쳐링 조성물 및 이의 제조방법 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000008024A (ja) * | 1998-06-25 | 2000-01-11 | Hiroaki Tanaka | 研磨用組成物及び研磨加工方法 |
JP2001093866A (ja) * | 1999-09-20 | 2001-04-06 | Speedfam Co Ltd | 酸化物単結晶ウェーハ加工用研磨用組成物及び酸化物単結晶ウェーハの研磨方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5769689A (en) * | 1996-02-28 | 1998-06-23 | Rodel, Inc. | Compositions and methods for polishing silica, silicates, and silicon nitride |
JP4163785B2 (ja) * | 1998-04-24 | 2008-10-08 | スピードファム株式会社 | 研磨用組成物及び研磨加工方法 |
JP4113282B2 (ja) * | 1998-05-07 | 2008-07-09 | スピードファム株式会社 | 研磨組成物及びそれを用いたエッジポリッシング方法 |
JP3563017B2 (ja) * | 2000-07-19 | 2004-09-08 | ロデール・ニッタ株式会社 | 研磨組成物、研磨組成物の製造方法及びポリシング方法 |
JP3440419B2 (ja) * | 2001-02-02 | 2003-08-25 | 株式会社フジミインコーポレーテッド | 研磨用組成物およびそれを用いた研磨方法 |
-
2005
- 2005-03-03 JP JP2006511147A patent/JPWO2005090511A1/ja active Pending
- 2005-03-03 KR KR1020067021592A patent/KR20060135028A/ko not_active Application Discontinuation
- 2005-03-03 WO PCT/JP2005/003627 patent/WO2005090511A1/ja active Application Filing
- 2005-03-03 US US10/593,147 patent/US20080096475A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000008024A (ja) * | 1998-06-25 | 2000-01-11 | Hiroaki Tanaka | 研磨用組成物及び研磨加工方法 |
JP2001093866A (ja) * | 1999-09-20 | 2001-04-06 | Speedfam Co Ltd | 酸化物単結晶ウェーハ加工用研磨用組成物及び酸化物単結晶ウェーハの研磨方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20180022485A (ko) * | 2016-08-24 | 2018-03-06 | 삼성에스디아이 주식회사 | 산화막용 cmp 슬러리의 제조 방법 |
KR101976899B1 (ko) | 2016-08-24 | 2019-05-09 | 삼성에스디아이 주식회사 | 산화막용 cmp 슬러리의 제조 방법 |
WO2023032714A1 (ja) * | 2021-09-01 | 2023-03-09 | 株式会社フジミインコーポレーテッド | 研磨用組成物 |
Also Published As
Publication number | Publication date |
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KR20060135028A (ko) | 2006-12-28 |
US20080096475A1 (en) | 2008-04-24 |
JPWO2005090511A1 (ja) | 2008-01-31 |
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